Question

A person pays off the debt of Rs. 62400 in 30 installments such that each instalment is Rs. 100 more than the preceeding one. Find the first instalment.

Answer 1

Step-by-step explanation:

S = 62400

n = 30

d = 100

it is an ap

62400 = 30/2 (2a+(30 - 1)100)

62400 = 15 = 2a + 2900

62400/15 = 2a + 2900

4160 - 2900/2 = 630 Ans...